Clancy plans to pursue an insanity defense based on a “lack of criminal responsibility," according to her attorney.

An active police investigation is underway in Easton, Massachusetts, on Tuesday afternoon. The Easton Fire Department confirmed that they had transported an adult female to a Boston hospital via medical helicopter with a gunshot wound.

The Duxbury mother charged in connection with the killing of her three young children will undergo a psychiatric examination by an expert chosen by prosecutors.

Lindsay Clancy, the Massachusetts mother accused of killing her three young children in the family's Duxbury home, has been ordered to undergo a psychiatric examination.